66201623481 has 8 divisors (see below), whose sum is σ = 100878664384. Its totient is φ = 37829499120.

The previous prime is 66201623461. The next prime is 66201623497. The reversal of 66201623481 is 18432610266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66201623481 - 2⁶ = 66201623417 is a prime.

It is a super-2 number, since 2×66201623481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66201623461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1576229110 + ... + 1576229151.

It is an arithmetic number, because the mean of its divisors is an integer number (12609833048).

Almost surely, 2^66201623481 is an apocalyptic number.

It is an amenable number.

66201623481 is a deficient number, since it is larger than the sum of its proper divisors (34677040903).

66201623481 is a wasteful number, since it uses less digits than its factorization.

66201623481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152458271.

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 66201623481 in words is "sixty-six billion, two hundred one million, six hundred twenty-three thousand, four hundred eighty-one".